title: Power, control, and validity in research.
authors.affiliation: Department of Special Education, University of Texas, Austin 78712-1290.
authors.forename: R M
authors.initials: RM
authors.lastname: Parker
mesh_terms: D002648:Child; D003118:Color Perception; D003627:Data Interpretation, Statistical; D004410:Dyslexia / Q000628:therapy*; D004519:Education, Special; D005139:Eyeglasses; D006801:Humans; D008402:Mass Media; D011209:Power, Psychological; D015203:Reproducibility of Results; D012107:Research Design